HIGH-PRODUCTIVITY SINGLE-STAGE METHOD AND APPARATUS FOR PRODUCING CONTAINERS MADE OF THERMOPLASTIC MATERIAL.

摘要

SINGLE-STAGE METHOD FOR THE PRODUCTION OF RESIN PREFORMS, COMPRISING THE PHASES OF: FILLING A PLURALITY OF MULTIPLE-CAVITY MOULDS, HOLDING AND COOLING DOWN SAID RESIN INSIDE SAID MOULDS (1), REMOVING THE MOULDED PREFORMS FROM SAID MOULDS (1), SUBJECTING SAID PREFORMS TO A SUBSEQUENT TEMPERATURE CONDITIONING PHASE, TRANSFERRING SAID PREFORMS TO APPROPRIATE BLOW-MOULDING TOOLS AND CLAMPING THEM THEREIN FOR FINAL BLOW MOULDING OPERATION, AND WHEREIN EACH ONE OF SAID MULTIPLE-CAVITY MOULDS COMPRISES A PLURALITY OF CAVITIES (2) DEFINED IN SEVERAL (N) DISTINCT CLUSTERS BELONGING TO THE SAME MOULD (1), SAID CAVITIES BEING COOLED DOWN BY MEANS OF FORCED CIRCULATION OF COOLING MEDIUM THROUGH APPROPRIATE COOLING CONDUITS (11), WHEREIN THE CAVITIES (2) BELONGING TO A SAME CLUSTER ARE COOLED IN A DISTINCT AND DIFFERENTIATED MANNER WITH RESPECT TO THE CAVITIES (2) BELONGING TO THE OTHER CLUSTERS OF CAVITIES PROVIDED IN THE SAME MOULD (1). SAID CLUSTERS OF PERFORMS ARE SUBJECTED INDIVIDUALLY TO SAID TEMPERATURE CONDITIONING PHASE IN AN ORDERLY SEQUENCE, SO AS TO CAUSE SAID CLUSTERS OF PREFORMS TO QUEUE UP FOR REACHING SAID TEMPERATURE CONDITIONING PHASE AFTER A DIFFERENTIATED TIME. FIGURE 3